Sase pulley



' Sept. 15-, 1925. 1,553,420

| M. WVILSON SASH PULLEY Filed July 18, 1924 WWW LORAl/V 17.1 W/LSM By MM Q /U all wjiom it Patented Sept. 15, 1925.

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Ammon flee: July 18, 19241 SeriQL No. [72 ,707.-

Be it known that-1 ,L0Rn1n M.-W1 ns0i,- a citizen of the United States; i-esidil g Indianapolis, in the; county of Marion and State oi Indiana, have inyented new and useful Imp oveinents in Sash; Pulleys, 0t which the following is a, specification. My invention has reference, in its broad aspect, to improvements inan ti frietion pul ley devices for sash weights; otthe type wherein the load-,- repre sented by sash and Weight is distributed between. a plu-, rality 7 0t pulleys,- and more partieulalrly it is my purpose to provide a device" of thischardeter which will not neeessifilte mortising oif the indow irame to which it is applied and c onntersi-nking the pulley box as inother devices now in; use, and furthermore the puiley box of mydeyieeisessentially a; onepieee strujcturedesi gned to be stampedand pressedYfronr blank of pressed steel on malleable iron, thereby decreasing its initia l cost of manufacture and greatly adding to st-fength; simplicity and durability. I Aceording to' my .intention it merely neeessary to bore a hole directly through a window frame into: which the eylindilfiea-l body ofmy pulley box is inserted, and means of late'rai ears through which serews are engaged with the rear ,fae'e of theifranfe my device is securely held in place against dis ')l acement. In mounting and detaching my pulley device nospeci'al. tools are neees ry and both ope-rationsnee'd; consume but :1 few moments. Furthermo e', I havepro; vidd unique means for reinforcing 'uliey deviee against downward stress 1- rag or; 'tertion-al' movement induced bythe load a- Window weight upon. the overhanging portionoi the V 1 I In addition-to the above ady'entages which ereflattribi table to my intention,- and, thers Vilz'iCll will hereinatten be apparent; it is so especially emphasized that in 'manu iacturi-n'g my pul'ley device on the; quantity production there are no operations which cannot be performedby conventional machinery, such as power presses-,; new in general use. The blank from Which my be:x is formed is designed to be cut from a sdok sheet ef metal formed in a single operation, at which time the ears are also stamped out; the pulleys are then mounted and the top meeting edges of the body braised or Welded together, whereupon the ends of the pulley shafts are upset/to oomnet ts assent-;, an it finite need: that the said pulley shafts" ser e. also to prevent gpreadingior distortion of the sides of the ox. v

Thestinet'uraI elements'employed to adqmnpn h the ahoife nd other resin-11s a d 05-, jeots ivilTbe hereinafter more fiilljddsfifibd in detail and. speeifically pointed out in the claims e ptn de thereuntq and formmga part of tliisspe'eific'ation, but; the sedge oft'he s" ention mayidnlyte determined tithe 13mi- I itsd'e'fined' in. the claims;

In the aoefonipanyingdrawin wherein is unarmed. the painted embodiment of lnyliliyenti ofi;u I Figure 1,18 a front elevation of my de- VLGe- F "=11'e2 is as ect ionajl side elevation. Show; ingiwa anmge the seam position of the pulley Figure 3: is a' rear: vi efi, p Figure 4 1s a. plan View ofthe \i'liich my pulley be); s fanned, and,

Eighti s is a, detail iew of (eye of 'tlie pulleys showing; the tan race;

ike stamens 0 reference refer to like es sinner paitstnrougiiout the sversi'views of the drawings; ,Wi'th' a View to. impetus staricli'i'ig of the manner of a: dear underthe ram ley deificeon thesuppositi'on that Such an understanding Will Tend to the complete and accurate reomprehension of amateur aevtails and env sages, attention" is invited to Fig re 4 of the unwise: wherein the time niswn mfone]11 ni putty hex-nan the time, the penitea is pressed outsppresently as indicated by the shade lines Y to fe gn aniii orinly casted em nent-gs straight edge 5, t l-1's isit i ntp maonthrowsthe edges 0 together, and in. th e' same operation theporidn's a at semi'eyiindncnly bent jyhich disposes parties substantially parallel and spaoedfrom each other; The nest operation, when is" the sen o e can:

sists in bending portions; to complete (in conjunction with adjadent ertains d) a true cylinder anytime during either of these operations the, ears 9" may be stamped out and the edge flan es" h turned at right angles to the body ail'ong' thedotted lines.

Re erri'ng new to the remaining figures of the drawing the body (1) of my pulley box, which is formed'as above described by cylindrically shaping the portions d and f of the blank, is provided Withfianges I ers (not shown).

along a portion of'the top meeting edges thereof, and these are brazed or welded together. Stamped out from the body are opposed lateral ears provided with;

openings (4) for receiving attaching screws (not shown) adapted for engagement in the rear face of a window frame to hold the body in place. Mounted on a shaft (46) *extending transversely through the body (1) isa pulley (5), said pulley is anti'frictionallymounted'by'means of ball bearings (6) operating in a ballrace (6 after the manner shown in Figure 5. It will be noted that the periphery of the pulley extends slightly in advance of the front edge of the ho i V Ifitegrally formed on the body (1) "is a cowl (7), the same being pressed from the blank shown in Figure 4 as indicated at a thereon, and extending from the'cowl are relatively parallel side portions (8) terminating in angular legs (9) each having one vertical straight edge (10) adapted to abut an adjacent window frame (not shown) to reinforce my device against downward stress or drag or tortional movement. The pulley (11), which is considerably larger in diameter than the pulley (5), is mounted on a shaft (12) journalled in the side portions (8), and is of the ball bearing anti-friction type shown in detail in Figure 5', with possible end play compensated for by loose wash- Each of the'legs (9) may be, and preferably is, providedwith a lateral foot (13) which is seatable against. the

face of a window frame to cooperate'with the. legs in firmly supporting my devicevin position' These feet may be formed integrally with the legs and stamped out simultaneously with the'legs, or they may. be brazed upon thelegs. I r a In operation; a hole" of suitable size .is

bored directly through a window frame and the body (1) of'my pulley box arranged therein with the smaller of the two pulleys, designated (5), carrying the load represented by the window sash. In this position the ears (3) are seated upon the'rear face of the frame with the legs (9) depending from the cowl and seatable with the feet (13) against the frame. The larger of the't-wo pulleys, designated ('11), overhangs the sash weight shaft and carries the load represented by the sash weight; the downward stress or drag or tortional movement bein taken up or compensated for by the legs (9 Attention is especially invited to the fact that considerable variation in the configuration of the pulley box can be indulged in without departing from the concept exemplified by washers for taking up end play.

While in the foregoing, there has been illustrated and described such combination and arrangement of elements as constitute the preferred embodiment ofmy invention, it is nevertheless desired to emphasize the fact that interpretation of the invention should only be conclusivewhen made in the light of the sub-joined claims.

Having described my invention and its objects with such attentionto detail as will tho-roughly acquaint one skilled in the art with its construction and advantages, I claim 1. A pulley device comprising a one piece housing, an integral element of said housing being'bent to. form a cowl, semi-cylindrical extensions formed on the integral element constituting the cowl and arranged with their respective upper andlower edges in abutmentto provide a cylindrical body, the respective upper edges of said semi-cylindrical extensions being flanged intermediate the ends of said extensions and said flanges being Ijoined to reinforce the body, a pulley carried'in the body, a pulley carried in the cowl with its axis of rotation above the lower'abutting edges of the semi-cylindrical extensions and below the axis of rotation of the pulley carried by the body, and relatively parallel depending members formed on the cowl, the lower edges of said depending members beinginclined with respect to the longitudinal axis of the body, and the forward edges of said members being arranged in a vertical plane and at right angles to the longitudinal axis of the body for the purpose set forth. I 2. article of manufacture for use in the making of boxingsfor pulley devices comprising a sheet metal blank formed with.

relatively angularly disposed sections converging to an unbroken portion having one straight edge and an edge portion on either side thereof diverging from the straight edge,-the material at the points of intersection of the diverging edges with the outer edges. of the angularly disposed sections being slit for the purpose defined.

In testimonywhereof I aflix my signature hereunto.

' I .lnonaln M. wiLsoN. 

